<!doctype html>
<html>
<head>
<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>

<link href='https://fonts.loli.net/css?family=PT+Serif:400,400italic,700,700italic&subset=latin,cyrillic-ext,cyrillic,latin-ext' rel='stylesheet' type='text/css' /><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; --title-bar-height:20px; }
.mac-os-11 { --title-bar-height:28px; }
html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body { margin: 0px; padding: 0px; height: auto; inset: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; }
iframe { margin: auto; }
a.url { word-break: break-all; }
a:active, a:hover { outline: 0px; }
.in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); }
#write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 36px; }
#write.first-line-indent p { text-indent: 2em; }
#write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; }
#write.first-line-indent li { margin-left: 2em; }
.for-image #write { padding-left: 8px; padding-right: 8px; }
body.typora-export { padding-left: 30px; padding-right: 30px; }
.typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; }
.typora-export .task-list-item input { pointer-events: none; }
@media screen and (max-width: 500px) {
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  #write { padding-left: 20px; padding-right: 20px; }
  .CodeMirror-sizer { margin-left: 0px !important; }
  .CodeMirror-gutters { display: none !important; }
}
#write li > figure:last-child { margin-bottom: 0.5rem; }
#write ol, #write ul { position: relative; }
img { max-width: 100%; vertical-align: middle; image-orientation: from-image; }
button, input, select, textarea { color: inherit; font: inherit; }
input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; }
*, ::after, ::before { box-sizing: border-box; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p { position: relative; }
p { line-height: inherit; }
h1, h2, h3, h4, h5, h6 { break-after: avoid-page; break-inside: avoid; orphans: 4; }
p { orphans: 4; }
h1 { font-size: 2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.6rem; }
h4 { font-size: 1.4rem; }
h5 { font-size: 1.2rem; }
h6 { font-size: 1rem; }
.md-math-block, .md-rawblock, h1, h2, h3, h4, h5, h6, p { margin-top: 1rem; margin-bottom: 1rem; }
.hidden { display: none; }
.md-blockmeta { color: rgb(204, 204, 204); font-weight: 700; font-style: italic; }
a { cursor: pointer; }
sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; }
sup.md-footnote a, sup.md-footnote a:hover { color: inherit; text-transform: inherit; text-decoration: inherit; }
#write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; }
figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; }
figure > table { margin: 0px; }
tr { break-inside: avoid; break-after: auto; }
thead { display: table-header-group; }
table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; }
table.md-table td { min-width: 32px; }
.CodeMirror-gutters { border-right: 0px; background-color: inherit; }
.CodeMirror-linenumber { user-select: none; }
.CodeMirror { text-align: left; }
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div.hr:focus { cursor: none; }
#write pre { white-space: pre-wrap; }
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#write pre.ty-contain-cm { white-space: normal; }
.CodeMirror-gutters { margin-right: 4px; }
.md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; }
.md-fences-adv-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; }
#write .md-fences.mock-cm { white-space: pre-wrap; }
.md-fences.md-fences-with-lineno { padding-left: 0px; }
#write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; }
.md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; }
.CodeMirror-line, twitterwidget { break-inside: avoid; }
.footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; }
.footnotes + .footnotes { margin-top: 0px; }
.md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; }
li div { padding-top: 0px; }
blockquote { margin: 1rem 0px; }
li .mathjax-block, li p { margin: 0.5rem 0px; }
li blockquote { margin: 1rem 0px; }
li { margin: 0px; position: relative; }
blockquote > :last-child { margin-bottom: 0px; }
blockquote > :first-child, li > :first-child { margin-top: 0px; }
.footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; }
#write .footnote-line { white-space: pre-wrap; }
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  body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; }
  #write { margin-top: 0px; padding-top: 0px; border-color: transparent !important; }
  .typora-export * { -webkit-print-color-adjust: exact; }
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  .is-mac table { break-inside: avoid; }
  .typora-export-show-outline .typora-export-sidebar { display: none; }
}
.footnote-line { margin-top: 0.714em; font-size: 0.7em; }
a img, img a { cursor: pointer; }
pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }
p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; }
#write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; }
p > .md-image:only-child { display: inline-block; width: 100%; }
#write .MathJax_Display { margin: 0.8em 0px 0px; }
.md-math-block { width: 100%; }
.md-math-block:not(:empty)::after { display: none; }
.MathJax_ref { fill: currentcolor; }
[contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; }
.md-task-list-item { position: relative; list-style-type: none; }
.task-list-item.md-task-list-item { padding-left: 0px; }
.md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; }
.math { font-size: 1rem; }
.md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; }
.md-toc-content { position: relative; margin-left: 0px; }
.md-toc-content::after, .md-toc::after { display: none; }
.md-toc-item { display: block; color: rgb(65, 131, 196); }
.md-toc-item a { text-decoration: none; }
.md-toc-inner:hover { text-decoration: underline; }
.md-toc-inner { display: inline-block; cursor: pointer; }
.md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; }
.md-toc-h2 .md-toc-inner { margin-left: 2em; }
.md-toc-h3 .md-toc-inner { margin-left: 4em; }
.md-toc-h4 .md-toc-inner { margin-left: 6em; }
.md-toc-h5 .md-toc-inner { margin-left: 8em; }
.md-toc-h6 .md-toc-inner { margin-left: 10em; }
@media screen and (max-width: 48em) {
  .md-toc-h3 .md-toc-inner { margin-left: 3.5em; }
  .md-toc-h4 .md-toc-inner { margin-left: 5em; }
  .md-toc-h5 .md-toc-inner { margin-left: 6.5em; }
  .md-toc-h6 .md-toc-inner { margin-left: 8em; }
}
a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }
.footnote-line a:not(.reversefootnote) { color: inherit; }
.md-attr { display: none; }
.md-fn-count::after { content: "."; }
code, pre, samp, tt { font-family: var(--monospace); }
kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; }
.md-comment { color: rgb(162, 127, 3); opacity: 0.6; font-family: var(--monospace); }
code { text-align: left; vertical-align: initial; }
a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; }
.os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; }
.md-diagram-panel > svg { max-width: 100%; }
[lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; }
[lang="mermaid"] .node text { font-size: 1rem; }
table tr th { border-bottom: 0px; }
video { max-width: 100%; display: block; margin: 0px auto; }
iframe { max-width: 100%; width: 100%; border: none; }
.highlight td, .highlight tr { border: 0px; }
mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); }
.md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; }
.md-expand mark .md-meta { opacity: 0.3 !important; }
mark .md-meta { color: rgb(0, 0, 0); }
@media print {
  .typora-export h1, .typora-export h2, .typora-export h3, .typora-export h4, .typora-export h5, .typora-export h6 { break-inside: avoid; }
}
.md-diagram-panel .messageText { stroke: none !important; }
.md-diagram-panel .start-state { fill: var(--node-fill); }
.md-diagram-panel .edgeLabel rect { opacity: 1 !important; }
.md-fences.md-fences-math { font-size: 1em; }
.md-fences-advanced:not(.md-focus) { padding: 0px; white-space: nowrap; border: 0px; }
.md-fences-advanced:not(.md-focus) { background: inherit; }
.typora-export-show-outline .typora-export-content { max-width: 1440px; margin: auto; display: flex; flex-direction: row; }
.typora-export-sidebar { width: 300px; font-size: 0.8rem; margin-top: 80px; margin-right: 18px; }
.typora-export-show-outline #write { --webkit-flex:2; flex: 2 1 0%; }
.typora-export-sidebar .outline-content { position: fixed; top: 0px; max-height: 100%; overflow: hidden auto; padding-bottom: 30px; padding-top: 60px; width: 300px; }
@media screen and (max-width: 1024px) {
  .typora-export-sidebar, .typora-export-sidebar .outline-content { width: 240px; }
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@media screen and (max-width: 800px) {
  .typora-export-sidebar { display: none; }
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/* meyer reset -- http://meyerweb.com/eric/tools/css/reset/ , v2.0 | 20110126 | License: none (public domain) */

@include-when-export url(https://fonts.loli.net/css?family=PT+Serif:400,400italic,700,700italic&subset=latin,cyrillic-ext,cyrillic,latin-ext);

/* =========== */

/* pt-serif-regular - latin */
/* pt-serif-italic - latin */
/* pt-serif-700 - latin */
/* pt-serif-700italic - latin */
:root {
	--active-file-bg-color: #dadada;
	--active-file-bg-color: rgba(32, 43, 51, 0.63);
	--active-file-text-color: white;
	--bg-color: #f3f2ee;
	--text-color: #1f0909;
	--control-text-color: #444;
	--rawblock-edit-panel-bd: #e5e5e5;

	--select-text-bg-color: rgba(32, 43, 51, 0.63);
  --select-text-font-color: white;
}

pre {
	--select-text-bg-color: #36284e;
	--select-text-font-color: #fff;
}

html {
	font-size: 16px;
	-webkit-font-smoothing: antialiased;
}

html, body {
	background-color: #f3f2ee;
	font-family: "PT Serif", 'Times New Roman', Times, serif;
	color: #1f0909;
	line-height: 1.5em;
}

/*#write {
	overflow-x: auto;
    max-width: initial;
	padding-left: calc(50% - 17em);
    padding-right: calc(50% - 17em);
}

@media (max-width: 36em) {
 	#write {
 		padding-left: 1em;
    	padding-right: 1em;
 	}
}*/

#write {
	max-width: 40em;
}

@media only screen and (min-width: 1400px) {
	#write {
			max-width: 914px;
	}
}

ol li {
	list-style-type: decimal;
	list-style-position: outside;
}
ul li {
	list-style-type: disc;
	list-style-position: outside;
}

ol,
ul {
	list-style: none;
}

blockquote,
q {
	quotes: none;
}
blockquote:before,
blockquote:after,
q:before,
q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}
/* styles */

/* ====== */

/* headings */

h1,
h2,
h3,
h4,
h5,
h6 {
	font-weight: bold;
}
h1 {
	font-size: 1.875em;
	/*30 / 16*/
	line-height: 1.6em;
	/* 48 / 30*/
	margin-top: 2em;
}
h2,
h3 {
	font-size: 1.3125em;
	/*21 / 16*/
	line-height: 1.15;
	/*24 / 21*/
	margin-top: 2.285714em;
	/*48 / 21*/
	margin-bottom: 1.15em;
	/*24 / 21*/
}
h3 {
	font-weight: normal;
}
h4 {
	font-size: 1.125em;
	/*18 / 16*/
	margin-top: 2.67em;
	/*48 / 18*/
}
h5,
h6 {
	font-size: 1em;
	/*16*/
}
h1 {
	border-bottom: 1px solid;
	margin-bottom: 1.875em;
	padding-bottom: 0.8125em;
}
/* links */

a {
	text-decoration: none;
	color: #065588;
}
a:hover,
a:active {
	text-decoration: underline;
}
/* block spacing */

p,
blockquote,
.md-fences {
	margin-bottom: 1.5em;
}
h1,
h2,
h3,
h4,
h5,
h6 {
	margin-bottom: 1.5em;
}
/* blockquote */

blockquote {
	font-style: italic;
	border-left: 5px solid;
	margin-left: 2em;
	padding-left: 1em;
}
/* lists */

ul,
ol {
	margin: 0 0 1.5em 1.5em;
}
/* tables */
.md-meta,.md-before, .md-after {
	color:#999;
}

table {
	margin-bottom: 1.5em;
	/*24 / 16*/
	font-size: 1em;
	/* width: 100%; */
}
thead th,
tfoot th {
	padding: .25em .25em .25em .4em;
	text-transform: uppercase;
}
th {
	text-align: left;
}
td {
	vertical-align: top;
	padding: .25em .25em .25em .4em;
}

code,
.md-fences {
	background-color: #dadada;
}

code {
	padding-left: 2px;
	padding-right: 2px;
}

.md-fences {
	margin-left: 2em;
	margin-bottom: 3em;
	padding-left: 1ch;
	padding-right: 1ch;
}

pre,
code,
tt {
	font-size: .875em;
	line-height: 1.714285em;
}
/* some fixes */

h1 {
	line-height: 1.3em;
	font-weight: normal;
	margin-bottom: 0.5em;
}

p + ul,
p + ol{
	margin-top: .5em;
}

h3 + ul,
h4 + ul,
h5 + ul,
h6 + ul,
h3 + ol,
h4 + ol,
h5 + ol,
h6 + ol {
	margin-top: .5em;
}

li > ul,
li > ol {
	margin-top: inherit;
	margin-bottom: 0;
}

li ol>li {
	list-style-type: lower-alpha;
}

li li ol>li{
	list-style-type: lower-roman;
}

h2,
h3 {
	margin-bottom: .75em;
}
hr {
	border-top: none;
	border-right: none;
	border-bottom: 1px solid;
	border-left: none;
}
h1 {
	border-color: #c5c5c5;
}
blockquote {
	border-color: #bababa;
	color: #656565;
}

blockquote ul,
blockquote ol {
	margin-left:0;
}

.ty-table-edit {
	background-color: transparent;
}
thead {
	background-color: #dadada;
}
tr:nth-child(even) {
	background: #e8e7e7;
}
hr {
	border-color: #c5c5c5;
}
.task-list{
	padding-left: 1rem;
}

.md-task-list-item {
	padding-left: 1.5rem;
	list-style-type: none;
}

.md-task-list-item > input:before {
	content: '\221A';
	display: inline-block;
	width: 1.25rem;
  	height: 1.6rem;
	vertical-align: middle;
	text-align: center;
	color: #ddd;
	background-color: #F3F2EE;
}

.md-task-list-item > input:checked:before,
.md-task-list-item > input[checked]:before{
	color: inherit;
}

#write pre.md-meta-block {
	min-height: 1.875rem;
	color: #555;
	border: 0px;
	background: transparent;
	margin-top: -4px;
	margin-left: 1em;
	margin-top: 1em;
}

.md-image>.md-meta {
	color: #9B5146;
}

.md-image>.md-meta{
	font-family: Menlo, 'Ubuntu Mono', Consolas, 'Courier New', 'Microsoft Yahei', 'Hiragino Sans GB', 'WenQuanYi Micro Hei', serif;
}


#write>h3.md-focus:before{
	left: -1.5rem;
	color:#999;
	border-color:#999;
}
#write>h4.md-focus:before{
	left: -1.5rem;
	top: .25rem;
	color:#999;
	border-color:#999;
}
#write>h5.md-focus:before{
	left: -1.5rem;
	top: .0.3125rem;
	color:#999;
	border-color:#999;
}
#write>h6.md-focus:before{
	left: -1.5rem;
	top: 0.3125rem;
	color:#999;
	border-color:#999;
}

.md-toc:focus .md-toc-content{
	margin-top: 19px;
}

.md-toc-content:empty:before{
	color: #065588;
}
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</style><title>4-4.金属指示剂</title>
</head>
<body class='typora-export os-windows'><div class='typora-export-content'>
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mathvariant="normal">H</mi></mrow><msub><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded width="0"><mphantom><mi>X</mi></mphantom></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded height="0"><mn>2</mn></mpadded></mrow></mrow></msub><mrow data-mjx-texclass="ORD"><mi data-mjx-auto-op="false">In</mi></mrow><msup><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded width="0"><mphantom><mi>X</mi></mphantom></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mo>+</mo></mrow></msup><mo stretchy="false">(</mo><mtext>黄</mtext><mtext>绿</mtext><mo stretchy="false">)</mo><mrow data-mjx-texclass="ORD"></mrow><mrow data-mjx-texclass="REL"><mover><mrow data-mjx-texclass="REL"><mover><mrow data-mjx-texclass="OP"><mrow data-mjx-texclass="ORD"><mpadded height="0" depth="0"><mrow data-mjx-texclass="ORD"><mo stretchy="false">↽</mo></mrow><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mo>−</mo></mrow></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mstyle displaystyle="false" scriptlevel="0"><mrow data-mjx-texclass="ORD"><mo>−</mo></mrow><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mo stretchy="false">⇀</mo></mrow></mstyle></mrow></mover></mrow><mrow><mi>p</mi><mstyle scriptlevel="0"><mspace width="0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mi data-mjx-auto-op="false">Ka</mi></mrow><msub><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded width="0"><mphantom><mi>X</mi></mphantom></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded height="0"><mn>1</mn></mpadded></mrow></mrow></msub><mrow data-mjx-texclass="ORD"><mo>=</mo></mrow><mn>1.9</mn></mrow></mover></mrow><mrow data-mjx-texclass="ORD"></mrow><mrow data-mjx-texclass="ORD"><mi data-mjx-auto-op="false">HIn</mi></mrow><mo stretchy="false">(</mo><mtext>黄</mtext><mo stretchy="false">)</mo><mrow data-mjx-texclass="ORD"></mrow><mrow data-mjx-texclass="REL"><mover><mrow data-mjx-texclass="REL"><mover><mrow data-mjx-texclass="OP"><mrow data-mjx-texclass="ORD"><mpadded height="0" depth="0"><mrow data-mjx-texclass="ORD"><mo stretchy="false">↽</mo></mrow><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mo>−</mo></mrow></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mstyle displaystyle="false" scriptlevel="0"><mrow data-mjx-texclass="ORD"><mo>−</mo></mrow><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mstyle scriptlevel="0"><mspace width="-0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mo stretchy="false">⇀</mo></mrow></mstyle></mrow></mover></mrow><mrow><mi>p</mi><mstyle scriptlevel="0"><mspace width="0.167em"></mspace></mstyle><mrow data-mjx-texclass="ORD"><mi data-mjx-auto-op="false">Ka</mi></mrow><msub><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded width="0"><mphantom><mi>X</mi></mphantom></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded height="0"><mn>2</mn></mpadded></mrow></mrow></msub><mrow data-mjx-texclass="ORD"><mo>=</mo></mrow><mn>12.2</mn></mrow></mover></mrow><mrow data-mjx-texclass="ORD"></mrow><mrow data-mjx-texclass="ORD"><mi data-mjx-auto-op="false">In</mi></mrow><msup><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mpadded width="0"><mphantom><mi>X</mi></mphantom></mpadded></mrow></mrow><mrow data-mjx-texclass="ORD"><mo>−</mo></mrow></msup><mo stretchy="false">(</mo><mtext>淡</mtext><mtext>红</mtext><mo stretchy="false">)</mo></mrow></math></mjx-assistive-mml></mjx-container></div></div><p><span>常用Cu-PAN指示剂（Cu-Y+PAN）</span></p><p><img src="1.jpg" ></p><h1 id='注意事项'><span>注意事项</span></h1><p><span>1.封闭现象：滴定终点没有立刻变色</span></p><p><span>2.僵化现象：指示剂水溶性差-&gt;加乙醇，加热</span></p><p><span>3。指示剂的氧化变质现象（铬黑T配成固体）</span></p></div></div>
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